#!/bin/bash

# 此脚本需要在keepalived节点执行，包括检测keepalived进程状态、端口状态

# 系统ID
system_id=$(cat config.cnf | grep SystemId | awk -F "=" '{print $2}')
# 告警存放文件夹
alert_dir=$(cat config.cnf | grep AlertDir | awk -F "=" '{print $2}')
# 告警缓存文件
alarm_file_tmp="keepalived_check_alarm.txt"
echo -n "" >${alarm_file_tmp}
# 本机ip
local_ip=$(ifconfig -a | grep inet | grep -v 127.0.0.1 | grep -v inet6 | awk '{print $2}' | tr -d "addr:")
# keepalived端口
keepalived_port=$(cat config.cnf | grep KeepAlivedPort | awk -F "=" '{print $2}')
execute_cycle=$(cat config.cnf | grep ExecuteCycle | awk -F "=" '{print $2}')


# keepalived运行状态监控
keepalived_status_check() {
    keepalived_status=$(ps -ef | grep keepalived | grep -v grep | grep -v keepalived_check |wc -l)
    # 检查状态是否为 active
    if [[ ${keepalived_status} == 0 ]]; then
        # 无进程进行告警
        ./gen_alarm.sh -g "应用进程监控" "keepalived服务运行状态异常,IP:$(hostname -I)" 3 "keepalived状态" "keepalived_status" ${alarm_file_tmp}
    else
        # 状态正常且存在状态告警，则需要恢复告警
        ./gen_alarm.sh -r "应用进程监控" "keepalived运行状态恢复正常,IP:$(hostname -I)" "keepalived进程" "keepalived_status" ${alarm_file_tmp}

        # 端口检查
        keepalived_port_check
    fi
}

# keepalived运行端口监控
keepalived_port_check() {
    port=$(netstat -nplw | grep ":${keepalived_port} ")
    if [[ ${port} == '' ]]; then
        # 端口未监听，告警
        ./gen_alarm.sh -g "端口状态" "keepalived服务端口[${keepalived_port}]未监听,IP:$(hostname -I)" 3 "keepalived端口状态" "keepalived_port" ${alarm_file_tmp}
    else
        # 端口正常且存在告警，需要恢复告警
        ./gen_alarm.sh -r "端口状态" "keepalived服务端口[${keepalived_port}]恢复正常,IP:$(hostname -I)" "keepalived端口状态" "keepalived_port" ${alarm_file_tmp}
    fi
}

while true; do
    holidays_date=$(cat config.cnf | grep Holidays | awk -F "=" '{print $2}' | sed "s/,/ /g")
	current_date=$(date +'%Y-%m-%d')
	echo $holidays_date | grep -o $current_date >> /dev/null
	if [[ $? -eq 0 ]]; then
		exit 0
	else
		echo -n "" >${alarm_file_tmp}
		keepalived_status_check
		# 将缓存告警放入告警文件夹
		./gen_alarm.sh -s ${alarm_file_tmp}
		sleep ${execute_cycle}
	fi
done
